Window-sash lock



Sept; 28. 1926.

F. E. SUTHERLAND WINDOW SASH LOCK Filed July 29, 925

I'arrelll. Suthez-l and Patented Sept. 28,1926.

PATENT OFFICE.

UNITED STATES FARRELL E. SUTHERLAND, OF COLUMBUS, OHIO, ASSIGNOR OF ONEFORTY-FIFTH TO MEDA F. OLAFFEY, 0F COLUMBUS, OHIO.

WINDOW-SASH LOCK.

Application filed July 29, 1925. Serial No. 46,908.

This invention relates to improvements in windowsash locks and has foran object the provision of a device of this character so constructedthat it will permit the upper and lower sashes of a window to beinterlocked when in a closed position, and whereby the respective sashesmay be partially opened and locked without any fear of intruders beingat liberty to undo the lock and open the window from the outside.

Another object of the invention resides in the provision of a lock thatis extremely simple in construction, cheap to manufacture and easy toinstall, and one that is not apt to get out of order due to its fewworking parts.

With these and other objects in view, the invention consists in thenovel features of construction, combinations of elements andarrangements of parts which will be fully set forth in the followingdescription and claim, and illustrated in the accompanying drawings, inwhich:

Figure l is a side elevation of a window comprising the presentinvention,

Figure 2 is a vertical sectional view taken on the line 2-2 of Figure 1,

Figure 8 is a horizontal sectional view taken on the line 33 of Figure2, and

Figure a is a perspective view of the lock.

Referring to the drawings in detail, the numeral 1 designates a windowframe in which is mounted upper and lower shashes 2 and 3 respectively.The upper cross rail 4 of the lower window sash 3 being recessed at oneend for the reception of a substantially U shaped plate 5 which is heldin the recess by suitable fastening devices 6. Slidably mounted withingrooves 7 formed in the opposed faces of the arms 8 of the plate 5 areribs 9 of the locking bolt 10, there being a spring 12 disposed betweenthe bight portion of the plate and the ad acent end of said bolt whichserves to urge the bolt outwardly, the purpose of which will appearlater.

The upper sash 3 has one of its vertical rails provided with a pluralityof plates 13 having openings 14, and with which the bolt 18 selectivelyengaged. In order to disengage the bolt from its locked position thesame is provided with a finger grip 15, in this instance the same beingin the nature of an upstanding flange. The outer end of the bolt 9 maybe equipped. with a rubber buffer 16 to prevent marring of the Woodworkas the sashes are operated.

As clearly shown in Figure 2 the bolt 9 is engaged in the opening 14 ofone of the plates 13, thus firmly interlocking the respective sashes. Tounlock the sashes it is only necessary to withdraw the bolt 9 fromengagement with the plate. It will be obvious that the sashes can belocked in various positions due to the arrangement of the plates 13.

From the foregoing description it will be seen that a window sash lockhas been provided which is extremely simple in construction, durable,efiicient in operation and one which can not be opened by personsoutside of the building.

WV hat is claimed is:

A sash fastener comprising a substantially U shaped plate adapted to berigidly secured to the edge of a Window sash, the inner wall of the armof said plate being provided with horizontal longitudinal extendinggrooves in the opposed faces thereof, a fiat locking plate slidablypositioned between said arms and having the side walls thereof providedwith laterally projecting ribs slidably received within said grooves, aspring between the stationary and movable plates and serving normally toproject the latter in an outward direction, and a, manipulatingprojection provided upon the movable plate.

In testimony whereof I affix my signature.

FARRELL E. SUTHERLAN D.

